Charlie Morton, known during his Pittsburgh days as “Ground Chuck,” has been reborn in Houston, new nickname and all.

These days, he is Charlie Freaking Morton – substitute your F word of choice if you wish – or simply CFM. Since he closed out the 2017 World Series, the #CFM hashtag has become a rallying cry for Astros fans on Twitter. It’s even recognized by the team’s official Twitter account, which routinely includes it in posts about the revelatory No. 5 starter.

The Astros’ pitchers get a kick out of it, too; they’ve discussed ordering custom-made CFM T-shirts. Morton, an inquisitive 34-year-old with a dry sense of humor, is beloved in Houston’s clubhouse and would be even if he hadn’t twice been a Game 7 hero last fall. “The nicest cat on the planet,” is how Gerrit Cole, a friend of five years, describes him.